Rename mbedtls_ssl_handshake_params variable ecdh_psa_shared_key to ecdh_psa_privkey_is_external

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 00f3989..ea3fe1a 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -632,7 +632,7 @@
     psa_key_type_t ecdh_psa_type;
     size_t ecdh_bits;
     mbedtls_svc_key_id_t ecdh_psa_privkey;
-    uint8_t ecdh_psa_shared_key;
+    uint8_t ecdh_psa_privkey_is_external;
     unsigned char ecdh_psa_peerkey[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH];
     size_t ecdh_psa_peerkey_len;
 #endif /* MBEDTLS_USE_PSA_CRYPTO || MBEDTLS_SSL_PROTO_TLS1_3 */